Is the Microsoft Band Battery Life any good?

I am not familiar with fitness bands with LCD screens. Is two days on a battery charge, lower if you use GPS, good? MS Band says "Life: 48 hours of normal use (Functionality like GPS will impact battery performance)"... The closest thing I can find is the Samsung Gear Fit which advertises "approximately 3-4 days of battery life with typical usage and up to 5 days of battery life with low usage."

The Band will split the difference between a fitness band and a smart watch. As far as battery life goes, it appears that it will have less time between charges than devices like the Fitbit Flex, which need charged once a week or less; but it will last longer on battery life than most smart watches, like the pending apple watch or the various Android powered watches like the Moto 360 or the Galaxy watches.